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DC91 19" 9U Rackmount Cluster / 16 Nodes (Subrack & 16 x Trays), Hot Swap 400mm DEEP
Chassis DC91

Would you like to build your own Blade System on a shoestring?

Slam the door! The DC91 chassis is created to make it easy.

Excellent alternative to traditional 1U rackmount servers. The DC91 chassis consists of Subrack (9U height), 16 plug-in Trays and 3 hot swappable redundant PSUs (2+1). The DC91 is intelligent system with remote control via Ethernet. With all this going on, the price of the DC91 is not higher than that of 16 equivalent chassis of 1U!
  • Uses regular Mini-ITX architecture with up to 3 HDDs 2.5'' for each Tray
  • Hot swappable 16 Trays, just unscrew the captive fastener and extract them from groove
  • Out-of-band management via Ethernet to handle hard reboot of the blades and total monitoring all the DC91
  • Power monitoring including power consumption and voltages through the all the DC91 rails
  • Temperature monitoring (44 points of measuring)
  • Perfect cooling, Hot Swap Redundant cooling fans (16 80x25mm)
  • Fan regulation 40%-100% versus temperature
  • The AC/DC power supply - Hot Swap Redundant 2+1 PSUs of input voltages (85 to 264V, 50/60Hz AC) and 12V output
  • Integrated DC/DC power supply in each of the Trays (12V input - ATX output)
  • The DC91 contains only ceramic capacitors except for AC/DC converter
  • 3 year limited warranty
  • Positive feedback from the company which uses the first 10 samples for more than 1 year
  • Low cost
The most powerful solution for the DC91
Pmax 65W
  • CPU Intel i7-3770T
  • Motherboard Intel DH77DF
  • one HDD
The DC91 Tray with Intel DH77DF board and one HDD
The most popular solutions for the DC91
Pmax 25W Pmax 50W Pmax 65W
  • CPU Intel Atom D525
  • Motherboard Intel D525WM
  • one HDD
The DC91 Tray with Intel D525WM board and one HDD
  • CPU Intel i3-2120T / i5-2390T
  • Motherboard GigaByte GA-H67N
  • two HDD
The DC91 Tray with Gigabyte GA-H67N, CPU i3-2120T and two HDD
  • CPU Intel Xeon E3-1260L / i5-2500T
  • Motherboard Intel S1200KP
  • two HDD
The DC91 Tray with Intel S1200KP board and two HDD
Brief annotation
for more information e-mail to inpc@inpc.com.ua
Chassis DC91 Diagramm
Do you want to control the blade-server from another computer or even mobile phone as if you were physically in front of it? You are welcome! The DC91 allows to have all 16 blade computers on your fingertips across the TC/IP Universe. The DC91 can reboot, or power ON or OFF, any of 16 blade computers. Of course, you can supervise the balde server by dedicated software and automatically reboot upon failure.

The DC91 power distribution monitor capabilities allow system administrator to monitor the power consumption of the blade computers and cooling system in real time through Internet providing various important power control functions including remote power consumption monitoring, and remote power status report.

You can easily control or monitor the DC91 cooling system from your computer, tablet or smartphone from anywhere in the world. The subjects of monitoring include current fan RPM value, voltage value applied to the fan for all 22 coling fans and temperature in 44 points.
The Main Controller
The DC91 Main Controller View
The DC91 Main Controller Diagramm
10/100Base-T Ethernet (red circle marked) allows you to plug the DC91 into any LAN that uses RJ45 connectors. That provides the Main Controller - ARM based bare-metal system which realises HTTP/FTP servers for user friendly monitoring and management of all the DC91 components - Backplates, AC/DC PSUs as well as trays with blade servers. The Main Controller uses dedicated SMBus to get access to the DC91 componets and does not use any interface of motherboard to get information form blade servers. Such approach allows to create a stand-alone software/hardware independent monitoring of the blades and the rest of the DC91 componets including all voltages (even ATX rails: 5Vsb, 5V, 3.3V and 12V), fan's voltage and currents in multiple points of the main 12V power distribution rail.
Using a common web browser, data can be made available to any user with a network connection. Coupling the embedded in DC91 control with web serving functionality truly bridges the gap between the DC91 environment and the network world. Just look at the screenshot:
As the DC91 GUI needs dynamic screens for data exchange and control the HTTP server implements Asynchronous JavaScript and XML (AJAX) and updates parts of a web page without reloading the whole page. The DC91 main controller dynamically generates XML files when collects current data from the DC91 components through SMBus. Web browser will then be able to interact with the served page(s), querying them using XMLHttpRequest, and receiving replies with timely data embedded in the XML files. It allows animate pictures and create a very dynamic web interface.
The HTTP (web) server serves out screen that is preprogrammed in the index.html file. The index.html file could be reprogrammed by user through the FTP. Acting this way user can create absolutely another GUI and even embed new services in Java script that has been run on Remote Console System. Such flexibility allows to develop author's remote control using manufacture's index.html file as a "knowlege base" to recognize "how it works" and create absolutely new user's own index.html file.
The DC91 Tray (empty)
The DC91 Tray is the basement for the blade server. The DC91 Tray contains control board with MCU and DC/DC ATX converter. The MCU controls various functions of the power supply operation. Also, it realizes current, voltage and temperature monitoring. The DC/DC ATX converter is specially designed to supply a low power consumption Mini-ITX system from a single 12V power source. The tray board uses only ceramic capacitors. So, it can be used for long time operation at 50ºC and higher without fundamental loss of reliability.
3.5" HDD cage
The DC91 Tray with 2x3.5''HDDs
If 3.5''HDD should be used the HDD cage is replaced. You can use either one standard 1" height HDD or two slim 2/3" height HDDs. 2x3.5HDD cage is supplied as option, but it is advisable to order required cage together with chassis.
Connection to the motherboard
Please refer to the following schematic to get tray connection to the motherboard right . NOTE! The polarity of connection is very important.

click on the picture to view details

The DC91 Tray with Intel D2500CC board and one HDD
and one HDD
The DC91 Tray with Intel D525WM board and one HDD
and one HDD
The DC91 Tray with Gigabyte GA-D510UD board and three HDD
and three HDD
The DC91 Tray with Intel D510MO board and one HDD
and one HDD
The DC91 Tray with Gigabyte GA-H67N, CPU i3-2120T and two HDD
i3-2120T and
two HDD
The DC91 Tray with Intel S1200KP board and two HDD
Xeon E3-1260L
and two HDD
The DC91 Tray with Intel DH77DF board and one HDD
and one HDD
AC/DC Power Supplying
The DC91 AC/DC PSU View
The AC/DC power supply contains of 3 Hot Swap units (Redundant 2+1). The unit is high efficient AC/DC converter with a wide range of input voltages (85-264V 50/60Hz AC) and 12V output. Passive backplane combines 3 outputs in one 12V powerfull rail with distribution over all the DC91 devices including DC/DC ATX converters in each of the 16 Trays. Each AC/DC converter unit has independent MCU - fan regulator with monitoring both cooling fans and temperature as well as output current and voltage.

AC/DC power supply options:
DC91350x3 - 3x350W
DC91350x2 - 2x350W
DC91225x3 - 3x225W
Air Cooling
The DC91 Housing Rear View
The DC91 Internal View
The subrack has 16 cooling fans of 80x25mm. It is more than enough for Mini-ITX solutions. So, the DC91 fan regulator commonly reduces the fan speed down to 40%. This minimizes the system acoustic noise, prolongs fans life, diminishes power consumption. The DC91 assures early diagnostics of fan failures and increases reliability of hardware functioning due to the overall monitoring of cooling system and signalling the status. The DC91 uses pre-charted matrix to make linear fan speed regulation. Linear control varies the voltage applied to the fan to adjust its speed. Fan revolution varies depending on measured temperature. A number of thermistors (red circle marked) and MCUs (fan regulators) realize separated regulation of cooling fans for independent airflows.

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